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Dirty Jobs: Septic-Tank Technician (3:00)
Mike Rowe learns how to clean a septic tank.
How It's Made: Shoe Polish (2:41)
This clip from Discovery Channel's series, "How It's Made," explains how shoe polish is created.
High Tech Vacuum Has UV Lights (1:00)
Did you know that the typical household carpet has 100,000 dust mites per square yard? Watch this video to see how a new type of "Halo" vacuum cleaner helps to keep carpets clean and dust mite-free. Carpets cover 70% of floor space in U.S. homes.
Dr. Know: Dirty Sponges (0:28)
Dr. Know reveals that toilets are dirty, but the kitchen sponge is dirtier still. Learn more about contamination, germs and disinfectants in this video from Discovery.
Nuke Your Sponge (1:29)
Watch this video from the University of Florida showing that nearly all of the bacteria found in a dish sponge can be killed after two minutes in the microwave. The sponge must be wet for this to work; be careful when removing it from the microwave.

